linux-kernel - Re: linux-next build error (3)

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Message-ID: <30f47a5c-1357-5c28-10b9-be02003d5a35@I-love.SAKURA.ne.jp>
Date:   Tue, 24 Jul 2018 20:44:43 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     syzbot <syzbot+9118f0a7ae77f4eee4a9@...kaller.appspotmail.com>,
        harry.wentland@....com, alexander.deucher@....com,
        Matthias Kaehlcke <mka@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: linux-next build error (3)

Dmitry,

Can you temporarily disable config options which are causing this build error?
syzbot is failing to test next-20180723 and next-20180724 due to this problem.

By the way, ".config" at
https://syzkaller.appspot.com/bug?id=bd788040e839b85be53a030f219a2a1e4dc8acd2 is
failing because of empty link.

  <a href="">.config</a>

On 2018/07/23 20:39, Dmitry Vyukov wrote:
> On Mon, Jul 23, 2018 at 1:38 PM, syzbot
> <syzbot+9118f0a7ae77f4eee4a9@...kaller.appspotmail.com> wrote:
>> Hello,
>>
>> syzbot found the following crash on:
>>
>> HEAD commit:    6d93abaf4c5b Add linux-next specific files for 20180723
>> git tree:       linux-next
>> console output: https://syzkaller.appspot.com/x/log.txt?x=10e02f0c400000
>> dashboard link: https://syzkaller.appspot.com/bug?extid=9118f0a7ae77f4eee4a9
>> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
>>
>> Unfortunately, I don't have any reproducer for this crash yet.
>>
>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> Reported-by: syzbot+9118f0a7ae77f4eee4a9@...kaller.appspotmail.com
> 
> +Matthias,
> 
> I guess this is caused by one of the following commits, and probably
> affects KASAN and similar tools:
> 
> commit cc32ad8f559c36ca2433d282aff690a6842a3a27
> Date:   Thu Feb 8 12:53:16 2018 -0800
> 
>     amdgpu/dc/calcs: Support clang option for stack alignment
> 
> commit 37172013fa2e527735ec9eda51a11cfea3af0ff1
> Date:   Thu Feb 8 12:53:14 2018 -0800
> 
>     amdgpu/dc/calcs: Consolidate redundant CFLAGS
>